What does it mean when someone licks u in a video game

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Write each fraction as an equivalent fraction with a denominator of 120then write the original fractions in order from samllest to largest

How do i do this activity, is appreciated